Rotary pump.



' PATENTED MAR. 14, 1905.

D. E. VIRTUE.

ROTARY PUMP.

APPLICATION FILED MAR. 22, 1904.

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PATENTED MAR. 14, 1905.

D. E. VIRTUE. ROTARY PUMP.

APPLICATION rmm MAR. 22, 1904.

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Z ram 0am mgw f1 wvm mi. m a s w UNITED STATES Patented March 14, 1905.

DENNIS E. VIRTUE, OF OlVATONNA, MINNESOTA.

ROTARY PUMP.

SPECIFICATION forming part of Letters Patent No. 784,715, dated March 14, 1905.

Application filed March 22, 1904. Serial No. 199,336.

To (1M w/wm it may concern:

Be itknown that l, DENNIS E.VIRTUE, a citizen of the United States, residing at Owatonna,

in the county of Steele and State of Minnesota, have invented certain new and usefulImprovements in Rotary Pumps; and I do hereby declare the following to be a full, clear, and exactdescription of the invention,such as will enable others skilled in the art to which it appertains to make and use the same.

My present invention has for its object to provide an improved rotary pump especially adapted for use in creameries; and to such ends it consists of the novel devices and combin ations of devices hereinafter described, and defined in the claims.

The invention is illustrated in the accompanyingdrawings, wherein like characters indicate like parts throughout the several views.

Figure 1 is a plan view of the improved pump. Fig. 2- is a side elevation of the same. Fig. 3 is a transverse vertical section taken approximately on the line 0 :0 of Fig. 1, and Fig. 4 is a vertical section on the line 11* 00* of Fig. 1.

The numeral 1 indicates the base of the pump, which is preferably in the form of a hollow casting bolted or otherwise rigidly secured to the base 1. At one end thereof is a shaft-bearing 2, and bolted or otherwise rigidly secured to the said base at the other end thereof is a cylindrical casting 3, which constitutes the pump-cylinder. This pump-cylinder 3 is. open at one side and at its other side is closed by a fixed head or wall having a shaft-bearing or hub 4, that projects in axial alinement with the shaft-bearing 2. The peripheral or cylindrical portion of the pumpcylinder 3 is quite narrow and at one point is formed with an upwardly-extending tangential discharge-neck 5, into which, as shown, is screwed the lower end of a discharge-pipe 6.

The open side of the cylinder 3 is normally closed byadetachable cylinder-head 7 of disklike form, the periphery of which is preferably set into a slightlycounterbored seat formed therefor in the said cylinder. A rubber or pliable gasket (not shown) may, as is evident, when desired be placed between the engaging portions of the cylinder and detachable cylinder-head.

The detachable cylinder-head 7 is cast integral with a tubular inlet-spout 8, which extends vertically downward on the outer side thereof and terminates in an inletport 8, which is located at the axis of the cylinder 3, as best shown in Fig. 4.

A yoke-like clamping-bar 9 is pivoted at one end at 10 to one side of the cylinder or shell 3, and at its other end it is formed with an inturned nose 11, which is adapted to engage with the rear face of a lug 12, formed on the cylinder 3 at a point diametrically opposite to the pivot 10. Preferably the lug 12 is formed at its lower edge with a stop-web 13, with which the nose 11 of the clampingbar 9 may engage to limit the downward pivotal movement of the said bar. At its central portion the clamping-bar 9 is formed with a hub 14, through "which a set-screw 15 works with screw threaded engagement. hen the clamping-bar 9 is engaged with the lug 12, as shown in the drawings, the inner end of the set-screw 15 is adapted to impinge against the depression of aboss 16, formed on the inlet-tube 8 of the cylinder-head 7.

When the set-screw 15 is tightened against the boss 16, it alines axially with the hub i, securely clamps the margin of the head '7 in the countersunk seat formed therefor in the cylinder 3, and the clamping-bar 9 is held in a centered position iinlependently of any action thereon of the stop-web 13. In fact, the said stop-web 13 should be so located that when the set-screw 15 is tightened the nose 11 i will be raised slightly out of engagement with the said stop-web.

The driving-shaft 17 is mounted in the shaftbearing 2 and in the hub a of the cylinder casting or shell 3 and projects into the said cylinder. Rig-idly secured to the shaft 17 within the cylinder or shell 3-is a fan-like rotary piston-head 18, the blades of which are cut away or narrowed up at 18, so as to give increased clearance for the inflowing liquid in the immediate vicinity of the port 8.' The blades of the piston-head 18 are curved slightly backward with respect to their direction of rotation of the piston, so as to increase the centrifugal action on the liquid within the cylinder.

On the pump-shaft 17 between the bearings 2 and 4: is a pair of pulleys 19-and 20, the former of which is fixed to the said shaft and the latter of which is loose thereon. The belt (not shown) which runs over the said pulleys is adapted to be shifted from one to the other thereof by a belt-shifter, shown as made up of an angular rod 21, having belt-engaging fingers 22, and mounted to slide through a bearing-hub 23,cast on the cylinder or shell 3.

The milk, cream, or other liquid is introduced into the cylinder or shell through the receiving-spout 8 and under the centrifugal force produced by the rotary piston-head 18 l is forced outward through the discharge-neck 5 and delivery-pipe 6. Under high rotation of the piston-head 18 if the blades thereof were constructed to run closely to the inletport 8 the free inflow of the liquid would in a measure be cut off or restricted. Hence the importance of locating the said inlet-port 8 at'the axis of the cylinder and piston-head and of cutting away the blades of the said piston-head to give additional clearance at the mouth of the said port.

The pump described has been thoroughly tested in practice and has been found extremely eii'icient for the purposes had in view. It will pump a liquid to a great height and runs without vibration. It may be very quickly taken apart or put together and may be very easily and thoroughly cleaned. As is evident, to remove the cylinder-hcad 7, with its integrally-attachc dinlet-spout 8, from the cylinder or shell 3 it is only necessary to loosen the set-screws 15 slightly and then throw the clamping-bar 9 upward and t0 the left into an inoperative position. Furthermore, the pump is of small cost and has no valves or other parts which are liable to get out of order or to wear out rapidly.

WV hat I claim, and desire to secure by Letters Patent of the United States, is as follows:

1. In a rotary pump, the combination with a cylinder having a peripheral dischargepas sage, of a detachable cylinder-head fitting one side of said cylinder and provided with an upturned integrally-formed inlet-spout opening into said cylinder at the axis thereof, a clamping-bar pivoted to said cylinder at one end and having interlocking engagement therewith at its free end, a set-screw at the central portion of said clamping-bar, engageable with said cylinder-head at the axis of said cylinder, to clamp said cylinder-head in working position, and a rotary piston working within said cylinder, substantially as described.

2. In a rotary pump, the combination with the cylinder casting or shell 3, having the peripheral outlet or neck 5, of the detachable head 7, fitting one side of said cylinder and having cast integrally therewith the upturned inlet-spout 8 terminating in an axial port 8, a clamping-bar having its base of reaction on the said cylinder casting or case, a setscrew working through the intermediate portion of said bar and engageable with said cylinder-head at the axis of said cylinder, to clamp said cylinder-head in working position, and the rotating piston-head 18 working in said cylinder or shell, and having a plurality of curved blades, cut away or reduced in width at 18 to afford increased clearance in the vicinity of said axial inlet-port 8, sub stantially as described.

In testimony whereof I aiiix my signature in presence of two witnesses.

DENNIS E. VIRTUE.

Witnesses:

F. A. DUNHAM, A. B. STEWART. 

